Holiday Trip 2012, Owner'S Manual

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2012 Trip
cHaSSIS - IntroDUctIon
This section contains information and
instruction regarding various components of
the motorhome chassis. These guidelines and
procedures help to understand the various
systems and how these systems operate. OEM
manuals for the engine and transmission are
located in the Owner’s Information File.
WARNING:
When welding is involved for
motorhome repair or modification,
only qualified, experienced technicians
should weld on the chassis. Improper
welding procedures and materials
may weaken the assembly or result in
damage that is not obvious and may
not cause an immediate problem or
failure. Unauthorized modifications or
repairs to the chassis could result in a
forfeiture of warranty coverage.
DANGER:
Due to the sensitive nature of the
electronics on the chassis, the
following precautions are required to
protect electrical components in the
motorhome chassis.
1. Disconnect the (+) positive and (-)
negative battery connection.
2. Cover electronic control
components and wiring to protect
from hot sparks.
3. Disconnect the terminal plugs from
the engine Electronic Control Unit,
located on the firewall.
4. Disconnect all the plugs from the
Transmission Control Module
located in the roadside front
electrical bay.
5. Disconnect wiring from the
alternator
6. Do Not connect welding cables to
electronic control components.
7. Attach the welding ground cable no
more than two feet from the part to
be welded.
The Roadmaster chassis design provides
exceptional balance, handling and braking
characteristics. The Roadmaster chassis is an
engine and frame unit featuring an all steel
frame design, providing greater structural
integrity and uniform stress distribution.
Incorporated in the Roadmaster chassis is
the air suspension system using four air bags
and shock absorbers. This design provides
the smoothest ride, best handling and trouble
free service while delivering excellent drive
ability. The Roadmaster chassis design offers
unsurpassed ease of maintenance and service.
The tow system is rated 7,000 lbs. towing
and 700 lbs. tongue weight.
The Roadmaster’s exclusive chassis with
air suspension consists of front and rear axles,
with trailing links. A panhard bar on each axle
controls side motion. Each axle mounts to the
trailing links that are connected to the chassis.
The design of the chassis offers increased
compartment storage space. The suspension
control arms attach to the frame through
bushings, which require no lubrication. The
suspension automatically maintains ride height
throughout the load range.
aIr SUpply SyStem
The air compressing system on the
motorhome is comprised of several items: air
compressor, air governor, air dryer, a front air
tank and a rear air tank. The compressed air
system operates several items, some of which
include brakes, suspension, air gauges and an
auxiliary air supply. The air system is charged
by a gear driven air compressor mounted
on the engine. As engine speed increases,
compressed air output increases. When air is
compressed, heat is generated. Heat dissipates
as air is discharged from the compressor.
Moisture condenses in the compressed air as
it cools. The moisture laden air then enters an
air dryer where the air is filtered. The filtered
air charges the front air tank. The front air
tank is divided in two halves: a wet side and
a dry side. The compressed air enters the wet
side before entering the dry side. A discharge
line from the dry side of the front air tank
charges the rear air tank. Discharge lines use
inline check valves to prevent back flow of
compressed air.
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